Vortex CK5272 GFRA 520RX3 Black Chain and Sprocket Kit 14/45 Tooth

The Vortex CK5272 is a GFRA "GoFast" 520 conversion chain and sprocket kit designed for street performance riding. This complete kit pairs a steel front countershaft sprocket with an F5 hardcoat aluminum rear sprocket and a Vortex RX3 X-ring chain, delivering a significant reduction in rotating mass compared to a stock OEM drive setup.

The kit is configured one tooth down in front (14T) with a stock-equivalent rear (45T), yielding a 3.21:1 final drive ratio for improved low-end throttle response and acceleration feel. The 520-pitch chain runs 110 links and is rated at 8,800 lbs tensile strength.

Rear Sprocket — F5 PTFE Hardcoat Aluminum:

• Constructed from aerospace-grade 7075-T6 aluminum for maximum strength-to-weight advantage
• Hard anodized with a jet black dye, then coated with PTFE for added lubricity and self-cleaning properties
• Significantly lighter than OEM steel sprockets — reduced rotating mass translates directly to improved acceleration
• 45 teeth, 520 pitch

Front Sprocket — Steel:

• High-carbon steel construction for extended wear life
• Drilled lightening holes reduce rotating mass without sacrificing strength
• 14 teeth, 520 pitch

Vortex RX3 Chain:

• 520 pitch, 110 links, black finish
• X-ring seal design reduces friction and heat buildup versus standard O-ring chains
• 8,800 lb tensile strength rating
• Includes rivet-type master link

Kit Specifications:

• Series: GFRA (GoFast Street Conversion)
• Chain Size: 520
• Chain Links: 110
• Front Sprocket: 14T Steel
• Rear Sprocket: 45T Hardcoat Aluminum
• Final Drive Ratio: 3.21:1
• Chain Color: Black
• Chain Tensile Strength: 8,800 lbs

Vortex Racing chain and sprocket kits are ready to install right out of the box, offering a direct performance upgrade over stock gearing for street riders seeking sharper acceleration and lighter drivetrain components.